Head-shaft

Position

Monitoring

System for

gyratory crushers

Sushant Tiwari

Gyratory Crushers

Used for sizing of coal at Coal Handling Plants

Gyratory

Crusher

Internals

WHY HEAD SHAFT POSITION IS FREQUENTLY

CHANGED?

•To control size of the crushed coal.

•To adjust for aberration of the mantle.

To adjust flow rate for slurry and powder coal.

•To remove trapped non-crushable foreign objects.

•To start under full load.

THE PROBLEM

Head shaft is raised or lowered with the help of a

hydraulic system.

There is no indication for position of the head shaft and

the operator monitors the oil level in the hydraulic tank

to estimate position. This method is however error prone.

Head shaft is subjected to extreme pressure if raised or

lowered beyond limits, which may result into premature

failure.

A system to facilitate the operator to know the real-time

position of the head shaft is needed.

PROPOSED

SOLUTION

An ultrasonic sensor that

measures the position.

A small computer which

process the data from

the sensor to human

readable form.

A console displays the

position in graphical

and numerical form

SENSOR

INSTALLATION

INTERFACING

PROGRAMMING AND

CALIBRATION

WORKING STATUS

THANK YOU